Create perfectly crisp cookies for years to come with this durable baking sheet from Calphalon. Expertly constructed to the standards of culinary professionals, it features two interlocking layers of high-performance nonstick for beautiful results and easy serving. Warranty Information. Heavy-gauge steel. Dishwasher safe. Imported. 14" X 17" Rolled edges for easy release. Oven safe to 500° Manufacturer's full lifetime warranty.